The returned sample was visually inspected upon receipt, during which no anomalies were noted.A review of the device history revealed no production related anomalies.Using the cdi 500 and cdi 540, gas calibration on the returned sample was attempted.The attempt resulted in the completion of calibration with an error appearing for slope error in pco2, po2, and ph.Although the failure mode seen by the customer was able to be recreated during the investigation, a definitive root cause could not be determined.All available information has been placed on file in quality management for appropriate tracking, trending and follow-up.
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The user facility reported to terumo cardiovascular systems corporation that prior to cardiopulmonary bypass, while the shunt sensor was being calibrated during set up, a sensor error was displayed and the unit was unable to be calibrated.Calibration was attempted again with the same result.The product was changed out and the procedure was completed successfully.It is unknown if there was any delay in beginning or continuing the procedure.
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